{"as_of":"2026-11-06","attribution":"FAA and NTSB data via eFlight Registry (https://eflight.com)","connections":[{"group":"Applies to","items":[{"count":159,"name":"Airbus Helicopters MBB-BK 117 C-2","note":"","unit":"registered","url":"https://eflight.com/models/airbus-helicopters/mbb-bk-117-c-2#airworthiness"}],"relation":"applies to"},{"group":"System","items":[{"count":null,"name":"Flight controls","note":"","unit":"","url":"https://eflight.com/systems/flight-controls"}],"relation":"about"},{"group":"More","items":[{"count":null,"name":"Every FAA order","note":"","unit":"","url":"https://eflight.com/directives"},{"count":null,"name":"Every aircraft system","note":"","unit":"","url":"https://eflight.com/systems"}],"relation":"see also"}],"graph":"https://eflight.com/graph","graph_index":"https://eflight.com/graph/index.json","license":"https://creativecommons.org/licenses/by/4.0/","node":{"effective":"2016-11-25","faa_document":"https://drs.faa.gov/browse/excelExternalWindow/84B12413698D7DA786258052005093C3.0001","id":"2016-21-03","kind":"AD","name":"Airworthiness directive 2016-21-03","published":"2016-10-20","subject":"Rotorcraft Flight Control","system":"flight-controls","type":"directive","url":"https://eflight.com/directives/2016-21-03"},"source":"FAA Civil Aviation Registry, FAA airport file, NTSB accident database; assembled by eFlight Registry"}